I have two sets of self-hosted GitHub runners that run the same action. I need to run slightly different steps on each set, triggered by conditions.

• Set 1: All names begin with foo-
• Set 2: All names vary

Runner names of the second set vary by design, so I want to avoid specifying runner names in the if: conditions, even though this condition works:

if: contains(runner.name, 'some-runner-name')

Instead, I want to trigger specific steps when runner.name DOES NOT contain foo-.

I have tried a few variants of these to accomplish this, but the steps do not get picked up on the desired runner when I compare what contains() returns with an operator like == 'false' or != true:

- if: contains(runner.name, 'foo-') == 'false'
  run: echo "Hello World!"
  shell: bash

- if: contains(runner.name, 'foo-') != 'true'
  run: echo "Hello World!"
  shell: bash

How can I properly use the contains(runner.name, 'foo-') function with an expression to set a condition?